/Engine/Source/Editor/SkeletalMeshEditor/Public/SkeletalMeshEditorSubsystem.h
Re-import the specified skeletal mesh and all the custom LODs.
true if re-import works, false otherwise see log for explanation.
static bool ReimportAllCustomLODs ( [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * SkeletalMesh )